there is no normal for kids, just normal for your daughter, which this is! She will grow into being less picky, but it will take time. [My 7yo son just admitted that mashed potatoes are indeed yummy, after turning his nose up at them his whole life.] Keep repeating your doctor's words, that she is still on track, it's OK, she's fine. If she needs more calories, she will get them, she'll eat when she needs to. Clearly right now she IS getting what she needs, or she wouldn't be able to pass anything up. Right now I suppose her exploration of the world (and her discovery that she has control over what goes in her mouth) is taking priority. That's OK.
keep her in the high chair and feed her there, and keep yourself calm and Whatever about it-- it's possible that pressure to eat is making her even more reluctant as a little power play. Put out those things you know she'll eat (the chicken, beans, etc) and a little of something else you want her to try. Generally, it may take kids 10 times of trying something to really realize they like it and will choose it again. So she may have tried the hummus several times and realized she doesn't like it, I guess it's good she tried it in the first place! Also, it's OK if she eats the same thing every day, if you stumble across a few things she likes, keep serving them! And remember too that portions are pretty small for a girl her age, I recall that the size of the stomach is just the size of her own fist. So she may be getting enough even though it doesn't look like much.
Bottom line -- stay calm, she will be OK, remove the pressure from both of you, and you'll find your way.